Dog Ownership A survey found that in a sample of 75
Chapter 9, Problem 11(choose chapter or problem)
Dog Ownership A survey found that in a sample of 75 families, 26 owned dogs. A survey done 15 years ago found that in a sample of 60 families, 26 owned dogs. At a _ 0.05 has the proportion of dog owners changed over the 15-year period? Find the 95% confidence interval of the true difference in the proportions. Does the confidence interval contain 0? Why would this fact be important to a researcher? Source: Based on statistics from the AmericanVeterinary Medical Association.
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